If I switch to the new release of Become A SOC Analyst - Level 1 dated 3/4/2024. Will I lose access the previous versions courses?
I think that is how it works. I would complete anything you are enjoying, then upgrade when you are done and happy and work on the new content as well. It’s a one-way operation so don’t do it until you are through with the content you are working on.
Also worth noting that all of the courses and labs in the old version are still available individually within the catalog. I would definitely encourage switching to the new version.